Actual Rotary Displacement Request

[Monkman33]

All of those support what I am saying, even though worded oddly in one of them.

The example from howstuffworks.com is assuming a 4 stroke engine. However, if you were to look at the same engine without ahead of valvetrain on it, it would displace the same total in one crankshaft revolution. Their example speaks of "ingesting" total displacement over 2 revolutions" which is true, because the term "ingesting" really has nothing to do with measuring the displacement, that has to do with engine type, 2 or 4 stroke).

So, with the added support of your posts, I will stand even more firmly on the definition of displacement bing the total volume displaced through 1 revolution of the crankshaft/eshaft/centershaft regardless of engine type. The air that the valves allow to be ingested has nothing to do with the engine's actual displacement. That just determines th engine type.